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A stroboscope is a light that flashes on and off at a constantrate. It can be used to illuminate a rotating object, and if theflashing rate is adjusted properly, the object can be made toappear stationary.
(a) What is the shortest time between flashes oflight that will make a three-bladed propeller appear stationarywhen it is rotating with an angular speed of 16.0 rev/s?
(b) what is the next shortest time interval?
A piece of nichrome wire is embedded into a 1-kg block of ice at -10°C. How long will it take to separate the wire from the ice
two capacitors are connected in parallel across the terminals of a battery. one has a capacitance of 2.0 microf and the
A 1-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 64? from the normal. what is the ray's angle from the normal
A 20 liter tank of helium is at a pressure of 190 kPa at a temperature of 0 C. What is the speed of the helium atoms in the tank at this new volume
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27e-25 kg. Determine the radius of the path
Two boxes of masses m1 = 20.0 kg and m2=40.0 kg are connected by a rope through a pulley that has a uniform wheel of mass M=10.0 kg
What is speed of the resulting ball of clay
What potential difference is required to bring the proton to rest? What potential difference is required to reduce the initial speed of the proton by a factor of 2? What potential difference is required to reduce the initial kinetic energy of the pro..
a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
A grinding wheel is initially at rest. A constant external torque of 47.2 N· m is applied to the wheel for 18.8 s, Find the frictional torque, which is assumed to be constant
What is the wavelength of light for the least energetic photon emitted in the Balmer series of the hydrogen atom spectrum lines
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